Burnishing machine or the like



Jan. 20, 1925 1,523,571

' C. H. WOLFE BURNISHING MACHINE OR THE LIKE Fil d S t, 21, 1922 7SheetsSheet 1 11v VENTQR JV,

A TTORNE 3 Jan. 1925- 1,523,571

c. H. WOLFE BURNISHING MACHINE on THE LIKE Fil ed Sept. 21, 1922 7Sheets-Sheet 2 $4,? 4 A TTOH/VEYT C. H. WOLFE BURNISHING MACHINE OR THELIKE Filed Sept. 21, 1922 7 Sheets-Sheet 5 nnnacanen .4 TTOR/VE r5 Jan.20, 1925.

c. WOLFE BURNISHING MACHINE 6R THE LIKE Filed Sept; 21, 2 7 Sheets-Sheet4 .4 TTORIVEVS C. H. WOLFE BURNISHING MACHINE OR THE LIKE Filed Sept.21.

7 Sheets-Sheet 5 JNVENTOR MW, 71';

ATTORNEYS Jan. 20, 25- 1,523,571

c. H. WOLFE BURNISHING MACHINE OR THE LIKE Filed Se t. E 22 7Sheets-Sheet 6 IN V JNVENTOR B I I CC 0%,

A TTORNEE g C. H. WOLFE BURNISHING MACHINE OR THE LIKE Filed Sept. 21,1922 7 Sheets-Sheet 7 INVENTOR A TTORNE y s Patented Jan. 20, 1925.

UNITED STATES 1,523,571 PATENT oer-ice;

CLARENCE H. WOLFE, OF NORWOOD, OHIO. ASSIGNOR TO THE DALTON ADDINGMACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

B' UBNISHING MACHINE OR THE LIKE.

Application filed September 21, 1922. Seria1No.588,632.

To all whom it mag concern; Be it known that I, CLARENCE H. WOLFE,

a citizen of the United States, residing at Non-wood, inthe county ofHamilton and State of Ohio, have invented certain new and usefulImprovements 'in Burnishing Machines or the like, of which the followingis a specification.

The machineof the present invention is particularly designed to apply toa steel or other metallic surface a type of finish commonly called thedamaskeen finish which is a type of finish frequently applied to safetydeposit boxes, bank vaults, Iwatoh movements and the like. The method ofapplying this finish consists of first nickle-plating the surfaces ofthe steel parts, and thereafter lmtling or polishing said parts in spotswith a small round felt or leather washer rotating in a machine, a finecutting compound being used in the butting or polishing process.

This method of finishing steel parts has usually involved a very slowand tedious process. It was usually performed by skilled workmen, andthe parts to be finished were moved along by hand at regular intervalsunder the rotating buffer.

The present invention is directed to an automatic machine for performingthis work. It is only necessary for the operator to load the machine andto turn a lever which sets the mechanism in motion, after which the workwill proceed until completed, at which point the machine will beautomatically stopped in preparation for a second load of metal parts.

The machine of the resent invention, as disclosed in the drawings,resembles, in its general construction, a standard drill press 1 so thatin the following specification it will not be deemed necessary to enterinto a detailed description of those parts which are standard in drillresses, the principal description being irected to the special featuresof the present invention.

In the drawings:

Figure 1' is a side elevation of the complete machine:

Fig. 2 is a front elevation of the u per portion thereof with certainportions the structure broken away to better illustrate the interiordetails;

Fig. 3 is a side elevation of the upper portion of the machine with the:spindle head and driving gear mechanism broken away;

- Fig. 4 is a plan view of the transversely movable work table. whichcarries the work across the machine from side to side as viewed in Fig.1 ,'and also showing the bufier gearing and associated parts;

Figs. 5 and 6 are two enlarged details of the table escapement mechanismfor giving a step by step movement to the table across the front of themachine;

Figs. 7 and 8 are two details of the mech anism for imparting to thetable short back and forth movements at right angles to its direction.step by step travel;

Fig. 9 is a view looking downwardly upon the mechanism shown in Figs. 7and 8, the table being broken away to expose the mechanism; and

Fig. 10 illustrates samples of the damaskeen work performed by themachine.

The'machine' as a whole is mounted upon a foundation plate 11 whichcarries a standard l2 forking at its upper end into a front arm 13 and arear arm 14 of a character commonly found in drill presses. The standard12 is rovided at a convenient height with a orwardly extending basebracket 15 which serves as a support for the tableand its associatedmechanism. The upper arms 18 and 14: are provided with suitable journalheads 15 and 16 for the journaling of a drive shaft 17 carrying an upperset of stepped pulleys 18 which cooperate with a similar lower set 19through the medium of a belt 20, power being derived from a belt 21 in amanner common to drill resses of standard construction.

The s aft 17, through suitable beveled gears (not shown) drives avertical spindle 22 journaled through a head 23 on the forward frame arm13. The spindle at its lower end (see Figs. 2 and 4) is provided with amain spur pinion 24 which meshes with an upper transmission pinion 25carried b a counter shaft 26 upon the lower end 0 which is mounted alower transmission pinion 27 meshing with a medial pinion 28 of a seriesof similar intermeshing pinions mounted upon bufler spindles 30 whichare arranged in a'strai ht line extending from front to rear of t emachine, as viewed in Fig. 1.

Each of the bufier spindles at its lower end carries a spring backedbuffer head 31 which affords a socket for a buffer disk 32 prcferably offelt which acts on the work head 33 carried by a sleeve 34 slidablymounted within va guide block 35 vertically aligned with the journalhead23 and integrally formed on the front end of the frame arm 13. Thesleeve 34 has secured on its rear side a' rack 36 slidable through theguide block 35 and engaged by a pinion 37 shown in dotted lilies inFig.3. The rotation of the pinion serves to lift the head 33 with the buffermechanism carried thereby, the spindle drive mechanism being suitablysplined or coupled, in a manner common in drill press construction, topermit such lifting actionwithout interfering with the driving movementsof the spindle.

The pinion 37is carried by a' transversely arranged stub shaft 38 whichextends inwardly from and is rigidly secured to an inner arm 39 whichabut-s against the face of a boss 40 laterally extending from the guideblock 35. vThe stub shaft 38 also serves as a pivotal mounting for anouter freely rocking arm 41. the two arms. when in locked operativerelationship, lying in parallel relation as indicated in Fig. 3.

The outer arm 41 is rocked by means of a sectioned link 42 having aninterposed turn buckle 43, the upper end of the link being pivoted to arocking bar 44 pivoted at its forward end toa bracket 45 secured to thejournal head 23and provided at its rear with a roller 46 entered withina cain truck 47 in a cam wheel 48, which latter is driven from a pulley49 carrying a belt 50 running over a pulley 51 on the power shaft 17."Suitable worm and gear connections (not shown) are provided fortransmitting motion from the pulley 49 to the cam wheel. In order tolock the constantly rocking outer arm 41 with the inner arni.39 whichcontrols the movements of the rack 36, a handle 52 is provided, whichhandle is pivoted on a pin 53 outwardly projecting from the outer arm.The handle; at its inner end is provided with a wedge-shaped cam plate54 which co-acts'with a slot 55 in a spring-pressed locking pin 56'slidably mounted in a bracket 57 outwardly extending from the outer arm41' The pin is intended, when in locking relation, to register with. anaperture 538 in the face of the inner arm 39, so that when the. handleis moved in position to release the pin, the latter will spring into theaperture and lock the two arms together, thereby causing the same torockin unison toraise and lower the head 33 with the burn'ishing diskscarried thereby under the control of the cam wheel: 48.

As shown in Fig. 3, the roller 46 occupies its innermost drill positionwhich serves pinion 37 in a clockwise direction with an attendant,lifting of the burnishing disks which areshown elevated from the worktable. The configuration of the cam track indicates-that, throughout themajor portion of a cam rotation, the roller 46 will be lifted, therebyimparting a downward movement to the burnishing disks which .to lowerthe link 42, thereby turning the i will thus be held in contact with thework throughout the major portion of the cam revolution. 1,

The handle 52 has pivoted thereto a plunger rod 59 which carries aplunger 60 slidably mounted within a barrel 61 and backed by a spring62. A spring latch 63 is pivoted to the barrel and its forward or actingend is adapted to engage the plunger when in retracted position, so thatwhen the handle has beenthrown back, as indicated in Fig. 3, to releasethe lock pin 56 and lock the inner and outer arms in operating relation.the latch will act to' hold the parts in rails 68 extending transverselyof the machine, as viewed from the front of Fig. -1.

llleans for transporting the carriage step by step across the front ofthe machine will now be described. The carriage is provided in itscenter with an'escapement ratchet 69 extending from end to end of thecarriage, as indicated in Fig. 2. The escapement ratchet has teeth onits upper edge and coacts with an escapement rocker 7 0 having fingers71. The escapement rocker is carried by a rocking pin 72 journaled in alug 73 upstanding from the base bracket 15 or other fixed portion of thestructure.

The rocking pin 72 has also mounted thereon an arm 74 which is securedthereto by a cross pin 7 5 provided with a protruding head 7 6 adaptedto be contacted by a trigger 76 pivoted on a pin 77 carried by theplunger 78 slidably mounted within a sleeve or housing 7 9 upstandingfrom the base bracket. is engaged by a-spring 80 likewise secured to thebase bracket, the sleeve or housing being provided with slots 81 onopposite The far end of the trigger bar, the right finger meanwhilecoming into" engagement with its proximate toothaftcr the manner commonin escapements,thereby allowing the carriage to advance a distancecorresponding to one half tooth, which ad 'vanee is effected by a weight82 acting through a cable 83 connected with the left end of the carriae, as viewed in Fig. 2.

Upon rise of tie plunger 78, the escape ment rocker will be drawn backto the position shown in Fig. 5 through the action of a spring 84 whichengages a finer 85 carried by the arm 74, thereby effecting another halftooth cscapement. When it is desired to move the carriage independentlyof the ac tion of the plunger, such movement can be effected manually bymeans of a handle 86 carried by a slide rod 87 which permits of arocking of the arm 74 irrespective of the position of the trigger 76.

The means for coordinating the vertical movements of the buffer carryingmechanism with a step by step feeding movement of The plunger 78 hasconnected thereto a plunger rod 88 which is guided through a bracket- 89laterally projecting from the head 33, which plunger rod, at its upperend, is pivoted to a link 90 which, in turn, is pivoted at its upper endto the inner operatin arm 39, so that the plunger will rise and all inat manner conformable to the movement of said arm which controlstheraising and lowering of the butting tools. As the rear end of the arni39 descends under control of the cam wheel to the point where thebuffing tools are lifted from the work, the plunger 78 will reach itslowermost position, thereby operating the escapement mechanism andpermitting a half tooth advance of the table. On the up stroke of theplunger, as the butting tools begin to descend, the

spring 84 will rock the escapement int-he opposite direction and effectanother half tooth advance of the table. so that a complete oscillationof the escapement mechanism during the idle interval of the butter willeffect a full tooth advance of the work table in preparation for thelowering of the buffers upon a newly positioned section of the work.

In order to automatically stop the step by step advance of the carriagewhen it has reached its limit of travel to the left, as indicated inFigs. 2 and 3, the carriage ispro vided with-an outwardly projectingstop bar '91 provided with a stop finger 92 so positioned that it willultimately engage the lower end of a rocking bar 93 pivoted to astandard 9% by a pivot pin 95. The upper end of the rocking bar 93occupies a position such that when it is rocked, it will ens'age thetail of the latch member 63 kicking back the latch, and allowing theplunger (30 to spring forward, thereby swinging the handle 5:2 andwithdrawing the lock pin 56 which disengages the inner rocking arm 39,and thereby stopping the feeding movestarting point by means of a handle96 outstanding from the right hand end of the carriage.

v In order to intermittently move the work table back and forth in shortsteps across the faceof the carriage transversely to its line of travel,the following mechanism is provided. The base bracket carries a fixedrack 97 upon which rides a spur gear 98 forming part of a hub 99 (seeFigs. 7, 8,

and 9). which hub is rotatably mounted upon a fixed shaft 100 carried bythe side. wall 101 of the carriage, said shaft being entered throughbosses 102 protruding inwardly from said side walls.

Freely mounted upon the fixed shaft adjacent the hub 99v on oppositesides thereof are a pairof ratchet wheels 103 having inwardly projectingteeth 104: whose apices occupy intermediate positions with respect toone another. The ratchet wheels are adapted to ,be locked to the hub bythe action of spring-backed locking pins 105 socketed within the hub andadapted to spring into locking recesses 106 in the respective innerfaces of the ratchet wheels, which recesses present an abrupt face onone side and an easy face on the other to per mit of disengagement ofthe ratchet wheels from the locking pins when the hub is rotated in areverse direction to permit a return movement of the carriage.

The oppositely acting ratchet teeth co-act with a plate 107 secured to'the under Side. of the work table 65. as indicated in Fig. 9, whichplate is provided on its opposite sides with a pair of beveled teeth 108in direct opposition to one another. The beveling of the plate teeth iscomplementary to that of the ratchet wheels. which latter being instaggered relation will act in alternation against the platc'teeth. sothat as the 'carriage advances step by step along its track. the gear 98will be rotated in a feeding di rection, and the ratchet wheels. nowbeing locked therewith. will likewise rotated. thereby imparting hackand forth movements of small degree to the work table concurrently withthe advance of the carriage "which will give to the work a zigzagmovemcnts of the escapement mechanism after ai'hich the table may bedrawn back to the ment of advance under the fixedly positioned rotatinbuffer disks. On the return movement 0 the carriage,- the ratchet wheelswill be automatically disengaged and the gear will roll freely along thefixed rack 97 as the carriage is returned to its starting position.

From the above description, it will be noted that after the machine isset in operation by a backward movement of the handle 52, the cam wheelwill impart a. downward movement to the head which carries the buffers,thereb bringing the buffer disks in contact with tie emel the rotationof the bu er disks will serve to impart the damaskeen finish to the workthroughout a major portion of rotation of the cam wheel. During thelatter partof said rotation, the cam track will eflect a liftingmovement of the bufi'er disks, and thereafter the down movement of thearm 39 and a depression-of the plunger'Tfi-fiill,

operate the escapeinent mechanism which will effect two half toothadvances of the" carriage and work table during. the idle in-' terval ofthe buffer disks. The advance of the carriage will, in turn, effect across-wise shifting of the work table with res ct to:

the carriage, so that upon the next merit of the bufi'er disks, asection of the work; indiagonal relation to that previously'finished,will be presented for action.

The above operations will continuous towmatically until the limit oftravel oft-he carriage has been reached, at which timetha handle 52 willbe automatically released. and

the feeding operations will come to setup, A sidewise shifting of thecarriage, concur- ,.rently with the longitudinal advancements thereof,gives the completed finish-the characteristic appearance of rows ofburnished circles in an overlapping relation and with the centers ofadjacent rows in staggered relation which is a characteristic feature ofa damaskeen finish, as indicated in the samples thereof illustrated inFig. 10.

Although the invention has been described with particularity as regardsthe details of construction, it is obvious that numerous modificationsin structure and in mechanical detail might be utili zed'wit-houtdeparting from the spirit of the invention.

' vother "forms-ofdworking tools, so that it is It is to be furtherunderstood that although the invention is primarilv intended as aburnishing machine, the feeding mechamsms'imght bejfused in associationwith not-intended to strictly limit the claims to a burnishing'inathine, unless the claims'contain' express 'j-limitation's ,to thateffect.-

I claimt' 1 j 1.. In a machine of the enerallclass de scribed, thecombination of automatic means for advancing and'retracting the workingtool to and'from working scribed, the combination of a working tool,

coated work which;

the feeding movements thereof, substantially as described.

tract-lug the buffer to and from working poa working tool,

position, a work table, automatic means for imparting a stop by stepmovement to the work table concurrently with the retracting of theworking tool, and means for imparting to the work table back and forthmovements at an angle to the direction of advance of the-work table,substantially as descril .1

2. n a machine of the general class de- 76 automatic means for advancingand retracting the working tool to and from working position, a worktable, automatic means for imparting a step by step movement to the worktable concurrently with the retracting of the working tool, and meansfor impartingto the work table back and forth movement at an angle tothe direction of advanced the work table concurrently with 3.ln'amachineot the general class described, the combination of arotatable bul fer, automatic means for advancing and re 00 sition, awork table. automatic means for imparting: a step by step movementto thework table concurrently with the retracting movements of the butter. andmeans for imparting to the work table back and forth {movements at, anangle to the direction of .advance of the work table concuricntly withthe feeding movements thereof, substantially as described. o 4. In amachine of the general class described, the combination of a rotatablebuf- "fer; automatidmeans for advancing and retracting the buffer to andfrom working position," a work table, automatic means for imparting astep by step movement to the 106 work table concurrently with theretracting: movements of the buffer, means for impartingtothe work tableback and forth movements at an angle to its line of advance concurrentlywith the feeding movements there- 110 of, andhneans for automaticallystopping' the feeding movements of the work table and the advancingmovements of thebuti'er at a predetermined point, substantially as deyscribed.

In a machine of thegeneral class described, the combination of arotating but for. a work table. a traveling: carriage upon which thework table is mounted. means for lowering and raising the buffer to andfrom working'positions, means for impartingto the carriage a step bystep advance during the 'idle'interval of the buffer. and means forimparting back and forth movements of the work .table across thecarriage during such idle, intervals, substantially as described I I 6;In a machine of the general class described, the combination of arotating buffer, a work table, a traveling carriage upon the idleinterval of the buffer. means for imparting back and forth movements ofthe work table across the carriage during; such idle intervals. andmeans operable at a predetermined pointin the travel of the carriage fordisengaging:- the carriage feeding means and the butter feeding means,substantially as dcscriljied.

7. In a machine of the general class described. the combination of arotatable buffer. i'neans for rotating the buffer, means for rasing andlowering the buffer, a work table. a rack carried by the work table,esrapement devices for allowing, a step by step es-capement of the worktable during the idle intervals of the buffer feeding mechanism, andmeans operable concurrently with the escapcment movements of the tablefor shifting the table at an angle to its line of advance, substantiallyas described.

8. In a machine of the general class described, the combination of arotatable buffer, means for rotating, the buffer, means for raising andlowering the buffer. a work table, a rack carried by the work table,escapci'nent devices for allowing a step by step escapement of the worktable during: the idle intervals of the buffer feeding mechanism, meansoperable concurrcnth with the escapement movements of the table forshifting the table at an angle to its line of advance. and automaticmeans operable at a predetermined point in the table advance to stop theoperation of the buffer feeding mechanism, the cscapemcnt mechanism andthe table shifting mechanism, substantially as described.

9. In a machine of the general class described, the combination of arotatable buffer. means for rotating the buffer, a work table, means forraising and lowering the buffer with respect to the work table, meansfor imparting a step by step advance to the work table, a cam forcontrolling the buffer feeding and table feeding devices in alternationto one another, and means operable by the advance of the table forimpaiting a back and forth movement thereto at an angle to its line ofadvance, substantially as described.

10. In a machine of the general class described, the combination of arotatable bu [i or, means for rotating the buffer, a work table, meansfor feeding the buffer toward and from the work table, cam actuatedmeans associated with said feeding means. means for locking the camactuated and feeding means together to effectcam controlled advance andreturn movements of the buffer, means associated with said feed ingmeans and acting in alternation with the ad ancing movements thereof foraffording a step by step movement to the table, and means actuated bythe feed of the table for imparting back and forth movements thereto atan angle to the line of feed, substantially as described.

ll. In a machine of the general class de scribed, the combination of arotatable buffer, means for rotating the bulfer, a work table, means forfeeding the buffer toward and from the work table. cam actuated meansassociated with said feeding means. means for locking the cam actuatedand feeding means together to elfect cam controlled advance and returnmovements 0 the buffer, means associated with said feeding means andacting in alternation with the advancing movements thereof for affordinga step by step movement to the table, means actuated by the feed of thetable for imparting back and forth move ments thereto at an angle to theline of feed, and vmeans operable at a given point in the feedingmovementsof the table for disengaging the cam actuated means,substantially as described.

12. In a machine of the general class de' scribed. the combination of aplurality of rotatable burnishers, means for imparting rotation to saidburnishers, means for advancingand retracting said burnishers, a worktable, a traveling carriage upon which said work table is mounted formovement at an angle to the line of carriage advance, cam controlledoperating devices, means for engaging the burnishing feeding means withsaid operating devices, means associated with the hurnishing feedingmeans and acting in alternation therewith for imparting a step by stepfeeding movement to the carriage, and interacting means between thecarriage and work table for shifting the latter transversely of the worktable concurrently with the feeding movements thereof. substantially asdescribed.

13. In a machine of the general class dcscribed, the combination of aworking tool, a work table associated with the working tool, a carriageon which said work table is mounted, means for imparting step by stepfeeding movements to the carriage, oppositely acting ratchet teethcarried by the carriage, means actuated by the advance of the carriagefor rotating said ratchet teeth. and a member carried by the work tableand adapted to be shifted back and forth by the alternate engagement ofsaid ratchet teeth for imparting back and forth movements of said worktable with respect to said carriage, substantially as described.

14. In a machine of the general class described. the combination of aworking tool. a work table associated with the working; tool. a carriageon which said work table is mounted, nicans for imparting step by stepfee movements to the carriage; a pair of oppositely acting 'ntehetwheels carried by the earriage, means operable by the advance of thecarriage for rotating the ratchet wheels, and a member carried by thework table and adapted to be alternately engaged. by the teeth of saidratchet wheels for imparting back and forth movements of said Work tablewitlrrespeetto said carriage, substantially as deseribed.

15. In a machine. of the general class described. the combination of aworking tool,

21 Work table nssoeinted with the working tool, a carriage on whichsand. work table is mounted, means for impartingstep'by etep wheels forrotating: the same. a fixedly positioned rack meshing with said gearwheel, and a member carried by said Work table adapted to be alternatelyacted upon by the teeth of said ratchet wheels for imparting back andforth movements to said work table with respect to said carriageconcurrently with the advance thereof, substantially as described.

CLARENCE H. WOLFE.

